--- /dev/null
+/* -*-c-*-
+ *
+ * Common definitions for block ciphers
+ *
+ * (c) 1999 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * Catacomb is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#ifndef CATACOMB_BLKC_H
+#define CATACOMB_BLKC_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <assert.h>
+
+#include <mLib/bits.h>
+
+/*----- Theory of operation -----------------------------------------------*
+ *
+ * A block cipher has associated with it a triple, called PRE_CLASS, of the
+ * form `(TYPE, ENDIAN, BITS)', where TYPE is either `N' (representing an
+ * implemented bit size) or `X' (representing an unimplemented bit size,
+ * causing loops to be compiled rather than unrolled code), ENDIAN is `B'
+ * (big) or `L' (little), and BITS is the block size of the cipher in bits.
+ */
+
+/*----- Data movement macros ----------------------------------------------*/
+
+/*
+ * `The C preprocessor. You will never find a more wretched hive of bogus
+ * hackery. We must be cautious.'
+ */
+
+/* --- General dispatch macros --- */
+
+#define BLKC_DOGLUE(x, y) x ## y
+#define BLKC_GLUE(x, y) BLKC_DOGLUE(x, y)
+#define BLKC_APPLY(f, x) f x
+#define BLKC_FIRST(x, y, z) x
+#define BLKC_SECOND(x, y, z) y
+#define BLKC_THIRD(x, y, z) z
+#define BLKC_TYPE(PRE) BLKC_APPLY(BLKC_FIRST, PRE##_CLASS)
+#define BLKC_ENDIAN(PRE) BLKC_APPLY(BLKC_SECOND, PRE##_CLASS)
+#define BLKC_BITS(PRE) BLKC_APPLY(BLKC_THIRD, PRE##_CLASS)
+
+#define BLKC_STORE_E(PRE) BLKC_GLUE(STORE32_, BLKC_ENDIAN(PRE))
+#define BLKC_LOAD_E(PRE) BLKC_GLUE(LOAD32_, BLKC_ENDIAN(PRE))
+
+/* --- Interface macros --- */
+
+#define BLKC_STORE(PRE, b, w) \
+ BLKC_GLUE(BLKC_STORE_, BLKC_TYPE(PRE)) \
+ (PRE, b, w, BLKC_STORE_E(PRE), BLKC_BITS(PRE))
+
+#define BLKC_XSTORE(PRE, b, w, wx) \
+ BLKC_GLUE(BLKC_XSTORE_, BLKC_TYPE(PRE)) \
+ (PRE, b, w, wx, BLKC_STORE_E(PRE), BLKC_BITS(PRE))
+
+#define BLKC_LOAD(PRE, w, b) \
+ BLKC_GLUE(BLKC_LOAD_, BLKC_TYPE(PRE)) \
+ (PRE, w, b, BLKC_LOAD_E(PRE), BLKC_BITS(PRE))
+
+#define BLKC_XLOAD(PRE, w, b) \
+ BLKC_GLUE(BLKC_XLOAD_, BLKC_TYPE(PRE)) \
+ (PRE, w, b, BLKC_LOAD_E(PRE), BLKC_BITS(PRE))
+
+#define BLKC_MOVE(PRE, w, wx) \
+ BLKC_GLUE(BLKC_MOVE_, BLKC_TYPE(PRE)) \
+ (PRE, w, wx, BLKC_BITS(PRE))
+
+#define BLKC_XMOVE(PRE, w, wx) \
+ BLKC_GLUE(BLKC_XMOVE_, BLKC_TYPE(PRE)) \
+ (PRE, w, wx, BLKC_BITS(PRE))
+
+#define BLKC_STEP(PRE, w) \
+ BLKC_GLUE(BLKC_STEP_X_, BLKC_ENDIAN(PRE)) \
+ (PRE, w)
+
+#define BLKC_ZERO(PRE, w) \
+ BLKC_GLUE(BLKC_ZERO_, BLKC_TYPE(PRE)) \
+ (PRE, w, BLKC_BITS(PRE))
+
+#define BLKC_SET(PRE, w, x) \
+ BLKC_GLUE(BLKC_SET_X_, BLKC_ENDIAN(PRE)) \
+ (PRE, w, x)
+
+#define BLKC_SHOW(PRE, tag, w) do { \
+ fputs(tag ": ", stdout); \
+ BLKC_SKEL_X(PRE, BLKC_W(w);, printf("%08x ", *_w++);); \
+ fputc('\n', stdout); \
+} while (0)
+
+/* --- General implementation skeleton --- */
+
+#define BLKC_SKEL(PRE, decl, guts) do { \
+ decl \
+ guts \
+} while (0)
+
+#define BLKC_P(p) register octet *_p = (octet *)(p)
+#define BLKC_W(w) register uint32 *_w = (w)
+#define BLKC_WX(wx) register uint32 *_wx = (wx)
+
+/* --- Implementation for unusual block sizes --- */
+
+#define BLKC_SKEL_X(PRE, decl, guts) \
+ BLKC_SKEL(PRE, unsigned _i; decl, \
+ for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) { \
+ guts \
+ })
+
+#define BLKC_STORE_X(PRE, b, w, op, n) \
+ BLKC_SKEL_X(PRE, BLKC_P(b); const BLKC_W(w);, \
+ op(_p, *_w); _p += 4; _w++; )
+
+#define BLKC_XSTORE_X(PRE, b, w, wx, op, n) \
+ BLKC_SKEL_X(PRE, BLKC_P(b); const BLKC_W(w); const BLKC_WX(wx);, \
+ op(_p, *_w ^ *_wx); _p += 4; _w++; _wx++; )
+
+#define BLKC_LOAD_X(PRE, w, b, op, n) \
+ BLKC_SKEL_X(PRE, const BLKC_P(b); BLKC_W(w);, \
+ *_w = op(_p); _p += 4; _w++; )
+
+#define BLKC_XLOAD_X(PRE, w, b, op, n) \
+ BLKC_SKEL_X(PRE, const BLKC_P(b); BLKC_W(w);, \
+ *_w ^= op(_p); _p += 4; _w++; )
+
+#define BLKC_MOVE_X(PRE, w, wx, n) \
+ BLKC_SKEL_X(PRE, BLKC_W(w); const BLKC_WX(wx);, \
+ *_w = *_wx; _w++; _wx++; ) \
+
+#define BLKC_XMOVE_X(PRE, w, wx, n) \
+ BLKC_SKEL_X(PRE, BLKC_W(w); const BLKC_WX(wx);, \
+ *_w ^= *_wx; _w++; _wx++; ) \
+
+#define BLKC_ZERO_X(PRE, w, n) \
+ BLKC_SKEL_X(PRE, BLKC_W(w);, *_w++ = 0;)
+
+#define BLKC_STEP_X_B(PRE, w) do { \
+ unsigned _i = PRE##_BLKSZ / 4; BLKC_W(w); uint32 _x = 0; \
+ while (_i && !_x) { _i--; _w[_i] = _x = U32(_w[_i] + 1); } \
+} while (0)
+
+#define BLKC_STEP_X_L(PRE, w) do { \
+ unsigned _i = 0; BLKC_W(w); uint32 _x = 0; \
+ while (_i < PRE##_BLKSZ / 4 && !_x) \
+ { _w[_i] = _x = U32(_w[_i] + 1); _i++; } \
+} while (0)
+
+#define BLKC_SET_X_B(PRE, w, x) do { \
+ unsigned _i; BLKC_W(w); unsigned long _x = x; \
+ for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) { \
+ *_w++ = U32(_x); \
+ _x = ((_x & ~MASK32) >> 16) >> 16; \
+ } \
+} while (0)
+
+#define BLKC_SET_X_L(PRE, w, x) do { \
+ unsigned _i; BLKC_W(w); unsigned long _x = x; _w += PRE##_BLKSZ / 4; \
+ for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) { \
+ *--_w = U32(_x); \
+ _x = ((_x & ~MASK32) >> 16) >> 16; \
+ } \
+} while (0)
+
+/* --- Implementation for known block sizes --- */
+
+#define BLKC_SKEL_64(PRE, decl, op, guts) \
+ BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1);)
+
+#define BLKC_SKEL_96(PRE, decl, op, guts) \
+ BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1); guts(op, 2);)
+
+#define BLKC_SKEL_128(PRE, decl, op, guts) \
+ BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3);)
+
+#define BLKC_SKEL_192(PRE, decl, op, guts) \
+ BLKC_SKEL(PRE, decl, \
+ guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3); \
+ guts(op, 4); guts(op, 5);)
+
+#define BLKC_SKEL_256(PRE, decl, op, guts) \
+ BLKC_SKEL(PRE, decl, \
+ guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3); \
+ guts(op, 4); guts(op, 5); guts(op, 6); guts(op, 7);)
+
+#define BLKC_STORE_GUTS(op, i) op(_p + 4 * i, _w[i])
+#define BLKC_XSTORE_GUTS(op, i) op(_p + 4 * i, _w[i] ^ _wx[i])
+#define BLKC_LOAD_GUTS(op, i) _w[i] = op(_p + 4 * i)
+#define BLKC_XLOAD_GUTS(op, i) _w[i] ^= op(_p + 4 * i)
+#define BLKC_MOVE_GUTS(op, i) _w[i] = _wx[i]
+#define BLKC_XMOVE_GUTS(op, i) _w[i] ^= _wx[i]
+#define BLKC_ZERO_GUTS(op, i) _w[i] = 0
+
+#define BLKC_STORE_N(PRE, b, w, op, n) \
+ BLKC_GLUE(BLKC_SKEL_, n) \
+ (PRE, BLKC_P(b); const BLKC_W(w);, op, BLKC_STORE_GUTS)
+
+#define BLKC_XSTORE_N(PRE, b, w, wx, op, n) \
+ BLKC_GLUE(BLKC_SKEL_, n) \
+ (PRE, BLKC_P(b); const BLKC_W(w); const BLKC_WX(wx);, \
+ op, BLKC_XSTORE_GUTS)
+
+#define BLKC_LOAD_N(PRE, w, b, op, n) \
+ BLKC_GLUE(BLKC_SKEL_, n) \
+ (PRE, const BLKC_P(b); BLKC_W(w);, op, BLKC_LOAD_GUTS)
+
+#define BLKC_XLOAD_N(PRE, w, b, op, n) \
+ BLKC_GLUE(BLKC_SKEL_, n) \
+ (PRE, const BLKC_P(b); BLKC_W(w);, op, BLKC_XLOAD_GUTS)
+
+#define BLKC_MOVE_N(PRE, w, wx, n) \
+ BLKC_GLUE(BLKC_SKEL_, n) \
+ (PRE, BLKC_W(w); const BLKC_WX(wx);, op, BLKC_MOVE_GUTS)
+
+#define BLKC_ZERO_N(PRE, w, n) \
+ BLKC_GLUE(BLKC_SKEL_, n) \
+ (PRE, BLKC_W(w); , op, BLKC_ZERO_GUTS)
+
+#define BLKC_XMOVE_N(PRE, w, wx, n) \
+ BLKC_GLUE(BLKC_SKEL_, n) \
+ (PRE, BLKC_W(w); const BLKC_WX(wx);, op, BLKC_XMOVE_GUTS)
+
+/*----- Test rig for block ciphers ----------------------------------------*/
+
+/* --- @BLKC_TEST@ --- *
+ *
+ * Arguments: @PRE@, @pre@ = prefixes for cipher-specific definitions
+ *
+ * Use: Standard test rig for block ciphers.
+ */
+
+#ifdef TEST_RIG
+
+#include <string.h>
+
+#include <mLib/quis.h>
+#include <mLib/testrig.h>
+
+#define BLKC_VERIFY(PRE, pre) \
+ \
+static int pre##_verify(dstr *v) \
+{ \
+ pre##_ctx k; \
+ uint32 p[PRE##_BLKSZ / 4]; \
+ uint32 c[PRE##_BLKSZ / 4]; \
+ uint32 d[PRE##_BLKSZ / 4]; \
+ dstr b = DSTR_INIT; \
+ int ok = 1; \
+ \
+ /* --- Initialize the key buffer --- */ \
+ \
+ dstr_ensure(&b, PRE##_BLKSZ); \
+ b.len = PRE##_BLKSZ; \
+ pre##_init(&k, v[0].buf, v[0].len); \
+ BLKC_LOAD(PRE, p, v[1].buf); \
+ BLKC_LOAD(PRE, c, v[2].buf); \
+ \
+ /* --- Test encryption --- */ \
+ \
+ BLKC_MOVE(PRE, d, p); \
+ pre##_eblk(&k, d, d); \
+ BLKC_STORE(PRE, b.buf, d); \
+ if (memcmp(b.buf, v[2].buf, PRE##_BLKSZ)) { \
+ ok = 0; \
+ printf("\nfail encryption:" \
+ "\n\tkey = "); \
+ type_hex.dump(&v[0], stdout); \
+ printf("\n\tplaintext = "); type_hex.dump(&v[1], stdout); \
+ printf("\n\texpected = "); type_hex.dump(&v[2], stdout); \
+ printf("\n\tcalculated = "); type_hex.dump(&b, stdout); \
+ putchar('\n'); \
+ } \
+ \
+ /* --- Test decryption --- */ \
+ \
+ BLKC_MOVE(PRE, d, c); \
+ pre##_dblk(&k, d, d); \
+ BLKC_STORE(PRE, b.buf, d); \
+ if (memcmp(b.buf, v[1].buf, PRE##_BLKSZ)) { \
+ ok = 0; \
+ printf("\nfail decryption:" \
+ "\n\tkey = "); \
+ type_hex.dump(&v[0], stdout); \
+ printf("\n\tciphertext = "); type_hex.dump(&v[2], stdout); \
+ printf("\n\texpected = "); type_hex.dump(&v[1], stdout); \
+ printf("\n\tcalculated = "); type_hex.dump(&b, stdout); \
+ putchar('\n'); \
+ } \
+ \
+ /* --- Return --- */ \
+ \
+ return (ok); \
+}
+
+#define BLKC_TEST(PRE, pre) \
+ \
+BLKC_VERIFY(PRE, pre) \
+ \
+static const test_chunk defs[] = { \
+ { #pre, pre##_verify, { &type_hex, &type_hex, &type_hex, 0 } }, \
+ { 0, 0, { 0 } } \
+}; \
+ \
+int main(int argc, char *argv[]) \
+{ \
+ test_run(argc, argv, defs, SRCDIR"/t/" #pre); \
+ return (0); \
+}
+
+#else
+# define BLKC_VERIFY(PRE, pre)
+# define BLKC_TEST(PRE, pre)
+#endif
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif
projects / u / mdw / catacomb / blobdiff